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AH - Fan Speed - How to determine

Do you have the Mfg specs on the AH and HP. A basic 5 ton a/c will need 2000 cfm. If you have the blower curve info on the AH you can check the static pressure then look at what blower spped you are at and cross to the CFM. The best CFM is whatever the MFG says it should be for your condenser AH match up.